code: def load_previously_used_personas_counts(fpath: str):
      """
      Loads an existing count for how many times each persona was used.
  
      This is useful if the task was restarted after some initial data collection.
      """
      logging.info("Loading the previous runs persona counts.")
      personas_count = defaultdict(int)
      try:
          with open(fpath, "r") as fi:
              for pl in fi:
                  if not pl.strip():
                      continue
                  persona, count = pl.strip().lower().split(";")
                  personas_count[persona.strip()] = int(count)
      except FileNotFoundError:
          logging.info(
              f"Persona count file not found in {fpath}. Starting new persona use counter."
          )
  
      logging.info(
          f"{len(personas_count)} previously used persona counts loaded."
      )
      return personas_count
  
imports: import random
  import os
  from collections import defaultdict
  import hydra
  from omegaconf import DictConfig
  from dataclasses import dataclass, field
  from typing import List, Dict, Any
  from parlai.crowdsourcing.projects.wizard_of_internet import constants
  from parlai.crowdsourcing.projects.wizard_of_internet.wizard_internet_blueprint import WIZARD_INTERNET_PARLAICHAT_BLUEPRINT
  from parlai.crowdsourcing.utils.mturk import MTurkRunScriptConfig
  import parlai.utils.logging
  from mephisto.abstractions.databases.local_database import LocalMephistoDB
  from mephisto.abstractions.blueprints.parlai_chat.parlai_chat_blueprint import SharedParlAITaskState
  from mephisto.operations.operator import Operator
  from mephisto.operations.hydra_config import register_script_config
  from mephisto.tools.scripts import load_db_and_process_config
label_desc: Use image node_id 2 for calling a global function with example usage: load_previously_used_personas_counts(fpath) and returns: personas_count